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1 . Let $A$ and $B$ be two independent events in some sample space $S$. You are given that $\Pr(A) = 1/4$ and $\Pr(B) = 2/3$. What is $\Pr(A \cup B)$?
(a)
1/3
(b)
3/4
(c)
5/6
(d)
2/3